:root{--ink:#203c3b;--muted:#637472;--paper:#f5f6f2;--white:#fff;--line:#dce4dd;--green:#25634d;--green-dark:#164b39;--mint:#e6f0e7;--lime:#d9e9a9;--sand:#f5e7cb;--blue:#e9f0f8;--shadow:0 8px 32px #223c3110;--radius:22px;--font:ui-rounded,"Segoe UI",Arial,sans-serif;color-scheme:light}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.55 var(--font);-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{color:inherit;cursor:pointer}button:disabled{cursor:default;opacity:.45}a{color:var(--green)}button{border:0}svg{display:block}button svg,.button svg,.inline-icon{width:22px;height:22px;flex:none;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}:focus-visible{outline:3px solid #a76b1b;outline-offset:4px}button:focus:not(:focus-visible){outline:none}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.18;letter-spacing:-.035em}h1{font-size:clamp(32px,3.3vw,45px);font-weight:700}h2{font-size:26px}h3{font-size:22px}p+p{margin-top:12px}[hidden]{display:none!important}.skip-link{position:fixed;top:10px;left:12px;transform:translateY(-160%);padding:12px 18px;background:var(--white);border:2px solid var(--green);border-radius:10px;z-index:100}.skip-link:focus{transform:translateY(0)}.site-header{background:#ffffffd9;border-bottom:1px solid var(--line)}.header-inner{max-width:1320px;margin:auto;padding:20px 34px;display:flex;justify-content:space-between;align-items:center;gap:18px}.brand{display:flex;gap:13px;text-align:left;align-items:center;background:none;padding:0;line-height:1.2;font-size:20px;letter-spacing:-.035em}.brand strong{font-weight:750}.brand small{font-size:11px;letter-spacing:.025em;display:block;margin-top:6px;color:var(--muted)}.brand-mark{width:46px;height:46px;background:var(--green);border-radius:15px;padding:9px;color:#e7efca;flex:none}.brand-mark svg{width:100%;height:100%;stroke:currentColor;fill:none;stroke-width:1.4;stroke-linejoin:round}.profile-button{display:flex;align-items:center;gap:14px;min-height:46px;padding:8px 14px 8px 19px;border:1px solid var(--line);border-radius:30px;background:var(--white);font-size:14px;font-weight:650}.profile-button svg{width:15px;height:15px}.page-wrap{max-width:1320px;padding:34px;margin:auto}.home-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:25px;margin-bottom:22px}.eyebrow{text-transform:uppercase;letter-spacing:.14em;color:var(--muted);font-size:11px;font-weight:750;display:block;margin-bottom:11px}.home-heading h1{margin-bottom:10px}.intro-text{color:var(--muted);max-width:540px;font-size:17px}.intro-icon{width:100px;height:100px;display:grid;place-items:center;border:1px solid #b3c8b9;border-radius:29px;background:linear-gradient(140deg,#e5eddd,#f0f2e9);transform:rotate(7deg);color:var(--green);margin:5px 30px 0 0}.intro-icon svg{width:54px;height:54px;stroke:currentColor;fill:none;stroke-width:1.5;transform:rotate(-7deg)}.group-bar{display:flex;align-items:center;gap:13px;flex-wrap:wrap;margin:26px 0 28px}.group-bar-label{font-size:13px;font-weight:650;margin-right:3px}.group-options{display:flex;gap:7px;flex-wrap:wrap}.group-option{border:1px solid var(--line);background:var(--white);border-radius:24px;padding:9px 17px;min-height:44px;font-size:14px;font-weight:600}.group-option[aria-pressed=true]{border-color:var(--green);background:var(--green);color:white}.group-note{font-size:13px;color:var(--muted);margin-left:auto;max-width:410px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:17px}.section-heading h2{font-size:21px}.small-note{font-size:12px;color:var(--muted)}.module-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.module-card{position:relative;padding:24px;text-align:left;border:1px solid var(--line);border-radius:var(--radius);background:var(--white);min-height:222px;display:flex;flex-direction:column;gap:12px;box-shadow:0 2px 3px #233c3110;transition:transform .16s,border-color 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p{font-size:14px;color:var(--muted);line-height:1.45;max-width:32ch}.module-card-bottom{margin-top:auto;padding-top:9px;display:flex;align-items:center;justify-content:space-between;gap:12px}.module-count{font-size:12px;color:var(--muted)}.card-arrow{width:30px;height:30px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center}.card-arrow svg{width:15px;height:15px}.module-progress{height:3px;border-radius:3px;background:#e7ece5;overflow:hidden;margin-top:0}.module-progress span{display:block;height:100%;background:var(--green);border-radius:3px}.continue-card{padding:18px 22px;border:1px solid #c3d0b0;border-radius:18px;background:#e7edda;display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:28px}.continue-card strong{display:block;font-size:16px}.continue-card p{color:var(--muted);font-size:13px;margin-top:3px}.button{min-height:48px;display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:12px 20px;border-radius:13px;font-size:14px;font-weight:650;text-decoration:none;border:1px solid transparent;line-height:1.3;transition:background .15s,box-shadow .15s;white-space:normal}.button-primary{background:var(--green);color:white}.button-primary:hover{background:var(--green-dark)}.button-secondary{background:var(--white);border-color:var(--line);color:var(--ink)}.button-secondary:hover{background:#edf2e9}.button-soft{background:var(--mint);color:var(--green);border-color:#c9dcc9}.button-wide{width:100%}.text-button{background:transparent;color:var(--green);padding:10px 0;min-height:44px;font-size:13px;text-decoration:underline;text-underline-offset:4px}.icon-button{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:#edf1e9;flex:none}.lesson-wrap{max-width:1400px;margin:auto;padding:22px 30px 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p{font-size:11px;color:var(--muted);margin-top:5px}.step-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:5px}.step-nav-button{width:100%;display:flex;align-items:center;gap:10px;padding:10px;border-radius:12px;background:transparent;text-align:left;font-size:12px;line-height:1.35;min-height:48px;border:1px solid transparent}.step-nav-button:hover{background:#e2e9dc}.step-nav-button[aria-current=step]{background:var(--white);border-color:#d0ddcc;box-shadow:0 2px 4px #233c3109;font-weight:650}.step-number{width:25px;height:25px;flex:none;display:grid;place-items:center;border:1px solid #c6d3c3;border-radius:50%;font-size:11px;color:var(--muted);background:#f8faf5}.step-number svg{width:14px;height:14px}.step-nav-button[aria-current=step] .step-number{background:var(--green);border-color:var(--green);color:white}.step-nav-button.complete .step-number{background:#d9e7c9;color:var(--green);border-color:#bdceae}.sidebar-note{font-size:10px;color:var(--muted);padding:15px 10px 0;line-height:1.5}.lesson-main{min-width:0}.step-heading{margin-bottom:22px;display:flex;gap:12px;align-items:flex-start;justify-content:space-between}.step-heading h1{font-size:clamp(28px,2.5vw,36px);max-width:26ch;outline:none}.step-kicker{display:flex;align-items:center;gap:9px;margin-bottom:11px;font-size:11px;color:var(--green);font-weight:750;letter-spacing:.08em;text-transform:uppercase}.step-kicker .dot{height:4px;width:4px;border-radius:50%;background:#94a886}.mobile-step-toggle{display:none}.step-card{background:white;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.step-content{display:grid;grid-template-columns:minmax(250px,.8fr) minmax(0,1.25fr);align-items:start}.step-text{padding:28px 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strong{color:var(--ink);display:block;margin-bottom:4px}.help-human{margin-top:13px;padding-top:12px;border-top:1px solid var(--line);font-size:12px}.check-card{margin-top:16px;border:1px solid var(--line);background:#fff;border-radius:15px;padding:19px 22px}.check-card h2{font-size:15px;letter-spacing:-.01em;margin:0 0 12px}.check-options{display:flex;gap:9px;flex-wrap:wrap}.check-option{background:var(--paper);border:1px solid var(--line);border-radius:11px;padding:10px 15px;min-height:44px;text-align:left;font-size:13px}.check-option[aria-pressed=true]{border-color:var(--green);background:var(--mint)}.check-feedback{padding-top:11px;font-size:13px;color:var(--green)}.check-feedback.retry{color:#8a5b24}.try-more{margin-top:16px;background:#f1ede3;border:1px solid #e2dbcc;border-radius:15px;overflow:hidden}.try-more summary{min-height:48px;cursor:pointer;padding:13px 18px;list-style:none;font-size:13px;font-weight:650;display:flex;gap:9px;align-items:center}.try-more svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.7}.try-more p{font-size:13px;padding:0 18px 17px;color:#715f43}.step-footer{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}.step-footer-left{display:flex;align-items:center;gap:12px}.mark-button{font-size:12px;padding:11px 14px;min-height:47px;display:flex;align-items:center;gap:9px;background:transparent;border:1px solid #ced9ca;border-radius:12px}.mark-button svg{height:18px;width:18px}.mark-button[aria-pressed=true]{background:var(--mint);border-color:#afc4a3;color:var(--green)}.nav-buttons{display:flex;gap:9px}.completion-note{margin-top:15px;font-size:11px;color:var(--muted)}.module-done{margin-bottom:20px;border:1px solid #bed0ad;border-radius:18px;background:#e8f0dc;padding:18px 22px;display:flex;gap:16px;align-items:center}.module-done>svg{width:30px;height:30px;fill:none;stroke:var(--green);stroke-width:1.7;flex:none}.module-done h2{font-size:18px;margin-bottom:5px}.module-done p{font-size:13px;color:var(--muted)}.module-downloads{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}.site-footer{max-width:1320px;margin:0 auto;padding:21px 34px 28px;display:flex;align-items:center;justify-content:space-between;gap:20px;color:var(--muted);font-size:11px}.home-bottom-note{margin-top:23px;display:flex;align-items:center;gap:9px;font-size:11px;color:var(--muted)}.home-bottom-note svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:1.8}dialog{border:1px solid var(--line);border-radius:25px;padding:28px;width:min(500px,calc(100% - 30px));color:var(--ink);background:var(--white);box-shadow:0 25px 100px #142b2540}dialog::backdrop{background:#18332c70;backdrop-filter:blur(3px)}.dialog-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:15px;margin-bottom:25px}.dialog-heading h2{font-size:27px}.field-label{font-size:13px;font-weight:650;display:block;margin:19px 0 8px}.optional{font-size:11px;font-weight:400;color:var(--muted);margin-left:5px}input,select{width:100%;padding:12px 14px;border:1px solid #bdcebf;border-radius:11px;background:#fff;color:var(--ink);min-height:48px;font-size:16px}.field-help{font-size:12px;color:var(--muted);margin-top:10px}.privacy-note{background:#f1f5ed;padding:15px;border-radius:13px;margin:20px 0;font-size:12px}.privacy-note strong,.privacy-note span{display:block}.privacy-note span{color:var(--muted);margin-top:5px}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,20px);max-width:min(480px,calc(100% - 28px));padding:14px 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.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.visual-type{justify-content:space-between;min-height:42px}.visual-zoom{display:flex;gap:5px;align-items:center;min-height:30px;font-size:10px;background:transparent;color:var(--green);padding:5px;border-radius:5px}.image-dialog .diagram{max-height:82vh;display:block;width:100%;height:auto}.image-dialog .diagram text{font-family:"Segoe UI",Arial,sans-serif}.module-files{margin-top:16px}.module-files .module-downloads{padding:0 16px 16px;margin:0}
@media(min-width:1101px){.lesson-wrap{padding-top:12px}.lesson-top{margin-bottom:8px}.step-heading{margin-bottom:17px}.step-heading h1{font-size:32px}.step-visual{padding-top:16px}.visual-frame .diagram,.visual-frame img{max-height:290px}.visual-frame{min-height:0}.header-inner{padding-top:16px;padding-bottom:16px}.instruction{font-size:18px}}
@media(min-width:1500px){.page-wrap{padding-top:43px}.module-grid{gap:20px}.module-card{min-height:236px}}
.module-icon svg,.card-arrow svg{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.brand{min-height:44px}.visual-zoom{min-height:44px}.profile-button,.mobile-step-toggle,.hint-next{min-height:44px}
.screenshot-area{display:flex;justify-content:center;background:#e9eeea}.screenshot-stage{position:relative;max-width:100%;min-width:0;line-height:0}.visual-frame .screenshot-stage img{width:auto;max-width:100%;height:auto;max-height:350px;object-fit:contain}.screenshot-marker{position:absolute;width:50px;height:58px;transform:translate(-90%,-89.655%);pointer-events:none;filter:drop-shadow(0 1px 2px #132c2940)}.screenshot-marker svg{width:100%;height:100%}.visual-marker-legend{list-style:none;margin:0;padding:13px 14px;background:#fffdf6;border-top:1px solid #e2e7da;display:grid;gap:9px}.visual-marker-legend li{display:flex;align-items:flex-start;gap:9px;font-size:12px;line-height:1.45}.visual-marker-legend li>span{height:23px;width:23px;border:1px solid #739a62;border-radius:50%;display:grid;place-items:center;flex:none;background:#fff7d5;color:var(--green);font-size:11px;font-weight:750}.visual-marker-legend p{margin-top:2px}.image-dialog .screenshot-stage img{width:auto;max-width:100%;max-height:76vh}.image-dialog .visual-marker-legend p{padding:0;margin-top:2px}.image-dialog .visual-marker-legend{margin-top:10px;border:1px solid var(--line);border-radius:10px}
.profile-reset{margin-top:18px;border-top:1px solid var(--line);padding-top:13px}.profile-reset summary{font-size:12px;color:var(--muted);cursor:pointer;min-height:44px;padding:10px 0}.profile-reset p{font-size:11px;color:var(--muted);margin-bottom:12px}.profile-reset .button{font-size:12px}.profile-button>span{max-width:210px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.home-heading{margin-bottom:30px}
.reset-confirm-buttons{display:flex;gap:9px;flex-wrap:wrap}.reset-confirm-buttons .button{flex:1}
@media(min-width:1101px){.visual-frame .screenshot-stage img{max-height:290px}}
@media(max-width:760px){.visual-frame .screenshot-stage img{max-height:none}.visual-marker-legend{padding:11px 12px}.visual-marker-legend li{font-size:11px}.screenshot-marker{width:44px;height:51px}}
@media(max-width:1100px){.header-inner,.page-wrap{padding-left:24px;padding-right:24px}.lesson-wrap{padding:18px 22px 25px}.lesson-layout{grid-template-columns:190px minmax(0,1fr);gap:18px}.step-sidebar{padding:14px 8px}.step-nav-button{font-size:11px;padding:9px 7px;gap:8px}.step-content{grid-template-columns:1fr}.step-text{padding:22px 23px 19px}.step-visual{padding:0 23px 19px}.visual-frame .diagram{max-height:340px}.visual-frame img{max-height:340px}.instruction{font-size:18px}.visual-frame{min-height:0}.step-download{margin-top:15px}.step-footer{align-items:flex-start;gap:10px}.step-footer-left{flex-wrap:wrap;gap:7px}.mark-button{font-size:11px}.button{padding:11px 15px}.intro-icon{margin-right:8px}.group-note{margin-left:0;max-width:none;width:100%}}
@media(max-width:760px){body{font-size:16px}.header-inner{padding:15px 18px}.brand{font-size:17px;gap:10px}.brand-mark{width:39px;height:39px;padding:8px;border-radius:12px}.brand small{font-size:9px;margin-top:5px}.profile-button{font-size:11px;gap:7px;padding:7px 11px;min-height:42px;max-width:145px}.profile-button svg{width:12px}.page-wrap{padding:28px 18px}.home-heading{gap:12px;margin-bottom:17px}.home-heading h1{font-size:32px}.intro-text{font-size:15px}.intro-icon{width:65px;height:65px;border-radius:19px;flex:none;margin:5px 1px 0 0}.intro-icon svg{width:37px;height:37px}.eyebrow{font-size:10px}.group-bar{gap:10px;margin:22px 0}.group-bar-label{width:100%;font-size:12px}.group-option{font-size:12px;padding:9px 15px}.group-note{font-size:11px}.module-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.module-card{padding:18px;min-height:218px;border-radius:19px;gap:10px}.module-icon{height:43px;width:43px;border-radius:14px}.module-icon svg{width:24px;height:24px}.module-tag{font-size:9px}.module-card-top{gap:5px;align-items:flex-start}.module-card h3{font-size:20px}.module-card p{font-size:12px}.module-count{font-size:10px}.card-arrow{height:26px;width:26px}.section-heading h2{font-size:19px}.section-heading .small-note{font-size:10px}.continue-card{align-items:flex-start;padding:17px;gap:12px;margin-bottom:23px}.continue-card .button{min-height:43px;padding:10px 12px;font-size:12px}.continue-card strong{font-size:14px}.continue-card p{font-size:11px}.continue-card .button svg{width:16px}.lesson-wrap{padding:13px 16px 24px}.lesson-top{gap:12px;margin-bottom:8px}.breadcrumb{font-size:11px;gap:7px}.lesson-top-progress{font-size:10px;white-space:nowrap}.lesson-layout{display:block}.step-sidebar{position:static;display:none;margin-bottom:20px;padding:13px}.step-sidebar.mobile-open{display:block}.step-list{display:grid;grid-template-columns:1fr 1fr;gap:6px}.step-nav-button{font-size:11px;min-height:50px}.sidebar-title{padding:3px 6px 12px}.sidebar-note{padding:12px 6px 2px}.step-heading{margin-bottom:16px;align-items:center}.step-heading h1{font-size:28px;max-width:none}.step-kicker{font-size:9px;letter-spacing:.07em;margin-bottom:8px}.mobile-step-toggle{display:flex;min-height:42px;padding:9px 11px;background:white;border:1px solid var(--line);border-radius:11px;align-items:center;gap:6px;font-size:10px;white-space:nowrap}.mobile-step-toggle svg{width:17px;height:17px}.step-card{border-radius:19px}.step-text{padding:21px 20px 18px}.instruction{font-size:17px}.step-visual{padding:0 14px 16px}.visual-frame img{max-height:none}.visual-frame .diagram{max-height:350px}.visual-caption{font-size:10px;margin-left:4px;margin-right:4px}.expected-row{padding:16px 19px;gap:11px}.expected-row p{font-size:13px}.expected-row strong{font-size:9px}.support-row{gap:10px;margin-top:12px}.support-box summary{font-size:11px;padding:12px;gap:6px}.support-box summary>span{gap:7px}.support-box summary svg{width:17px;height:17px}.support-content{font-size:12px;padding:0 12px 13px}.check-card{padding:17px;margin-top:12px}.check-card h2{font-size:14px}.check-option{font-size:12px;padding:9px 12px}.try-more{margin-top:12px}.try-more summary{font-size:12px}.step-footer{flex-direction:column;align-items:stretch;margin-top:17px;padding-top:15px;gap:14px}.step-footer-left{width:100%;display:block}.mark-button{width:100%;justify-content:center;font-size:12px}.nav-buttons{width:100%}.nav-buttons .button{flex:1;min-height:49px}.completion-note{font-size:10px}.site-footer{padding:16px 18px 25px;align-items:flex-start;font-size:9px;gap:12px}.site-footer .text-button{font-size:10px;padding-top:0;min-height:35px}.home-bottom-note{font-size:10px;align-items:flex-start}.module-done{padding:15px;gap:12px}.module-done h2{font-size:16px}.module-done p{font-size:12px}dialog{padding:23px}.dialog-heading h2{font-size:25px}.toast{bottom:15px;font-size:12px}}
@media(max-width:390px){.module-grid{grid-template-columns:1fr}.module-card{min-height:188px}.brand small{display:none}.profile-button{max-width:130px}.intro-icon{display:none}.group-option{padding-left:12px;padding-right:12px}.step-heading h1{font-size:25px}.step-list{grid-template-columns:1fr}.support-row{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.module-card:hover{transform:none}}

.step-nav-top{justify-content:flex-end;margin:-3px 0 18px}.step-nav-top .button{min-width:115px}